A.O. Smith GDV Instruction Manual page 28

PROBLEM
SLOW HOT WATER RECOV-
ERY
DRIP FROM RELIEF VALVE
THERMOSTAT FAILS TO
SHUT OFF
COMBUSTION ODORS
SMOKING AND CARBON
FORMATION (SOOTING)
CONDENSATION
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
BURNER FLAME TOO HIGH
FLAME BURNS AT ORIFICE
POSSIBLE CAUSE(S)
1. Insuffi cient secondary air
2. Flue clogged
3. Low gas pressure
4. Improper calibration
5. Gas control/thermostat set too low
6. Water heater too small
7. Wrong piping connections
8. Wasted hot water
1. Excessive water pressure
2. Heater stacking
3. Closed water system
4. Temperature setting too high
1. Defective gas control/thermostat
2. Improper calibration
1. Insuffi cient secondary air
2. Flue clogged
3. Heater installed in a confi ned area
1. Insuffi cient secondary air
2. Low gas pressure
3. Flue clogged
4. Defective gas control/thermostat
5. Heater installed in a confi ned area
6. Burner fl ame yellow-lazy
1. Temperature setting too low
2. Water heater too small
1. Orifi ce too large
2. High gas pressure
3. Flue clogged
4. Cold drafts
1. Orifi ce too large
1. Defective gas control/thermostat
2. Low gas pressure
3 Orifi ce not properly installed
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e and burner
2. Clean fl ue, locate source and correct
3. Check with gas utility company
4. Replace gas control/thermostat
5. Turn temperature dial to desired setting
6. Install adequate size heater
7. Correct piping-dip tube must be in cold inlet
8. Advise customer
1. Use a pressure reducing valve and relief
valve
2. Lower the thermostat setting
3. See "Closed System/Thermal Expansion"
4. Decrease the temperature setting
1. Replace gas control/thermostat
2. Replace gas control/thermostat
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e, burner
2. Clean, locate source and correct
3. Provide fresh air ventilation
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e, burner
2. Check with gas utility company
3. Clean, locate source and correct
4. Replace gas control/thermostat
5. Provide fresh air ventilation
6. See "Burner Flame Yellow-Lazy"
1. Increase the temperature setting
2. Install adequate size heater
1. Replace with correct orifi ce
2. Check with gas utility company
3. Clean fl ue and burner-locate source & cor-
rect
4. Locate source and correct
1. Replace with correct orifi ce
1. Replace gas control/thermostat
2. Check with gas utility company
3 Reinstall the orifi ce
28
CORRECTION